Any genre to be honest as long as It's animation, is decent. Here's my favorites as reference:

MHA - 8 seasons, finished.

Tensura - 4 seasons, airing.

JJK - 3 seasons, ongoing.

TFFBWD - 1 season, ongoing.

Roshidere - 1 season, ongoing.

Jobless Reincarnation - 2 seasons, ongoing.

TQQ - 2 seasons, finished.

Blue Box - 1 season, ongoing.

Re: Zero - 4 seasons, airing.

COTE - 4 seasons, airing.

Date A Live - 5 seasons, finished.

Assassination Classroom - 2 seasons, finished.

Horimiya - 2 seasons, finished.

The Angel Next Door Spoils Me Rotten - 2 seasons, airing.

Takopi - 1 season, finished.

To Your Eternity - 3 seasons, ongoing.

Too Many Losing Heroines - 1 season, ongoing.

Shoshimin - 2 seasons, finished.

Frieren - 2 seasons, ongoing.

The Elusive Samurai - 1 season, ongoing.